616-23-9Relevant articles and documents
-
Floutz
, p. 2516 (1948)
-
Effect of sodium chloride on the solubility and hydrolysis of epichlorohydrin in water
Dmitriev,Zanaveskin,Khadzhiev
, p. 1627 - 1630 (2018)
The mutual solubility of the components in the epichlorhydrin–water–sodium chloride system was studied in the temperature range of 20–90 °С. It was found that epichlorohydrin is salted out as the concentration of NaCl increases. The Sechenov coefficient was determined to be equal to 0.29. It was found that epichlorohydrin reacts with an aqueous solution of sodium chloride to form glycerol dichlorohydrins. Alkali formed during this reaction catalyzes the hydrolysis of epichlorohydrin to glycerol monochlorohydrin, acts as a reagent in the glycidol formation and accelerates its subsequent conversion to glycerol.
Chlorohydrination of allyl chloride with HCl and H2O2 catalyzed by hollow titanium silicate zeolite to produce dichloropropanol
Peng, Xinxin,Xia, Changjiu,Lin, Min,Yuan, Hui,Zhu, Bin,Zhang, Yao,Wang, Baorong,Shu, Xingtian
supporting information, p. 1221 - 1225 (2017/08/15)
Overall, over 95% of epichlorohydrin is industrially manufactured via the chlorohydrination route with hazardous Cl2 as a reagent, which brings serious operation and pollution problems. Herein, we describe a novel Cl2-free process for the synthesis of dichloropropanols from allyl chloride with H2O2 and HCl catalyzed by hollow titanium silicate zeolite under mild conditions. A high conversion and overall dichloropropanol selectivity exceeding 95% are simultaneously achieved, and the heterogeneous catalyst is highly stable and amenable for reuse. Comprehensive experimental and spectroscopic data suggest that the Lewis acidity of the framework Ti species has a synergistic effect with the Br?nsted acidity of HCl that promotes the epoxidation of allyl chloride and the ring opening of the epoxy groups.
Method for comprehensive utilization of hexachloroethane
-
Paragraph 0015; 0017-0019; 0021; 0023; 0025; 0027; 0030, (2017/10/27)
The invention relates to a comprehensive utilization method of a dichloroethane chlorination byproduct namely hexachloroethane. The comprehensive utilization method comprises the following steps: adding a hexachloroethane solution, glycerin, a hydrogenation catalyst and a chlorination catalyst into a high-pressure kettle; after feeding is finished, performing hydrodechlorination and glycerin chlorination reaction at the same time at certain temperature and under certain hydrogen pressure; after reaction is finished, maintaining the temperature for 4h, and then reducing the temperature to the room temperature; performing filtering separation to obtain the hydrogenation catalyst, layering reaction liquid to obtain a solvent layer and a glycerin layer, wherein the solvent layer contains a solvent, pentachloroethane, pentachloroethane and trichloroethane, and the glycerin layer contains the glycerin, dichloropropanol, water, the chlorination catalyst and monochlorohydrin.